He saw no one; but half way up the cliff was a huge bowlder, over which peered a pair of eyes that were closely watching every move he made; and, when Arthur whistled twice, the eyes disappeared, and a man stepped from behind the rock, and said, in a gruff voice: "Who are you, and what do you want here ?" "Are you Pierre Costello ?" asked Arthur.
"Well, now, that's no concern of yours," replied the man.

"Who are you ?" As he spoke, he drew a revolver from his sash, and rested it on the rock beside him, the muzzle pointing straight at the boy's head.
"Don't!" cried Arthur, turning pale, and stepping back.

"I am Arthur Vane, and I have come here to have a talk with you.

Here is Joaquin's knife, which will prove that I am all right." The man returned his revolver to his belt, and came down the cliff; and, presently, Arthur found himself standing face to face with a live robber.
"I am Pierre Costello," said the latter; "and I was waiting for you.".